Question

For a pnp transistor to operate in saturation region of its output characteristic in CE configuration which of the following conditions should be met
(a) The emitter base junction should be forward biased and base collector junction should be reversed biased.
(b) Both junctions should be forward biased.
(c) The base emitter junction should be reverse biased and base collector junction should be forward biased.
(d) Both junctions should be reverse biased.

Answer 1

Answer:

Option b "Both junctions should be forward biased" is correct.

Explanation:

The are three modes in common emitter configuration-

1. active region

2. saturation region

3. cut off region.

For active regions: The emitter-base junction must be forward-biased and the collector-base junction must be reverse-biased.

For saturation region: The emitter-base junction must be forward biased and collector-base junction must be forward biased.

For the cut-off region, the emitter-base junction must be reverse biased and the collector-base junction must be reverse biased

Therefore, option b is correct that both junctions should be forward biased.

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